Sophos

W32/Agobot-AE

Aliases
  • Backdoor.Agobot.3.m
  • W32.HLLW.Gaobot.AE
Category
Type
What to do
Prevalence low high

Summary

 
Protection available since 7 October 2003 13:39:45 (GMT)
Detected by All Sophos products
  • Endpoint Security and Control 9.0
  • Small business solutions 4.0

Action

Please follow the instructions for removing worms.

Check your administrator passwords and review network security.

Download and install the Microsoft patches mentioned above.

You will also need to edit the following registry entries, if they are present. Please read the warning about editing the registry.

At the taskbar, click Start|Run. Type 'Regedit' and press Return. The registry editor opens.

Before you edit the registry, you should make a backup. On the 'Registry' menu, click 'Export Registry File'. In the 'Export range' panel, click 'All', then save your registry as Backup.

Locate the HKEY_LOCAL_MACHINE entries:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Config Loader= "<copy of the worm>"

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Config Loader= "<copy of the worm>"

and remove any reference to any file you deleted.

Close the registry editor.

More Information

W32/Agobot-AE is a network worm which also allows unauthorised remote access to the computer via IRC channels.

W32/Agobot-AE copies itself to network shares with weak passwords and attempts to spread to computers using the DCOM RPC and the RPC locator vulnerabilities.

These vulnerabilities allow the worm to execute its code on target computers with System level privileges. For further information on these vulnerabilities and for details on how to protect/patch the computer against such attacks please see Microsoft security bulletins MS03-026 and MS03-001.

W32/Agobot-AE drops a copy of itself to the Windows system folder and creates
the following registry entries to run itself on system restart:

HKLM\Software\Microsoft\Windows\CurrentVersion\Run\
Config Loader= "<copy of the worm>"

HKLM\Software\Microsoft\Windows\CurrentVersion\RunServices\
Config Loader= "<copy of the worm>"

W32/Agobot-AE attempts to terminate various processes related to anti-virus and security software (e.g. SWEEP95.EXE, BLACKICE.EXE and ZONEALARM.EXE).

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